Billiard-ball



(No Model.)

G. H. BURT. BILLIARD BALL.

No. 517,972. Patefitd AprflO, 1894.

UNITED STAT s ATENT OFFIoE.

GEORGE H. BURT, OF MILLBURN, NEW JERSEY.

BlLL lARD-BALL.

I SPECIFICATION forming part of Letters Patent No. 517,972, dated April 10, 1894.

Application filed January 1'7, 1894:. Serial No. 497,197- (ll'o model.) I

To a.Z Z whom it may concern:

Be 1t known that I, GEORGE H. BURT, a citizen of the United States, residing at Millburn, 1n the county of Essex and State of New J ersey, have invented certain new and useful Improvements in Billiard -Balls and I do declare the following to be a full, clear, and exact descrlption of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which a form a part of this specification.

My invention relates to composition balls for use in playing pool and other games, such as shown and described in my Patents Nos. 507,880 and 513,876.

The object of the present invention is to enable balls to be made by the employment of a lower temperature and less pressure than is the case with those shown in the said patents, thus rendering their man ufacture quicker and cheaper and also obviating irregularities in the lines formed by the union of the differently colored parts, such irregularity being attributable to the high temperature and great pressure employed.

I To the ends stated, and others to which the lnvention may pertain, the same consists in the ball, and in the method employed in making the same substantially as andfor the pur- I pose hereinafter specified and claimed.

In the drawings, Figure l is a perspective view of the main or foundation portion of the ball and the number spot and'its encircling ring or tube separated; Fig. 2 a section through the same, and Fig. 3 a section through the completed ball. I

The type of ball shown in the drawings is the same as that shown in my Patents Nos. 507,880 and 513,87 6, that is to say, one having a circumferential stripe at its middle portion through which the number spots of a different color appear. In making this ball, I form a composition by dies, or otherwise, a main or foundation portion of uniform color throughout comprising a spherical or globular part A of a diameter about one fourth of an inch less than the completed ball, and having a circumferential enlargement a which forms the stripe in the finished ball, whose diameter is substantially that of thecompleted ball.

The portions of the sphere each side of the less heat and pressure are required than in the case of the balls as shown in my previous patents to 'fuse and unite the composition of the respective parts. To attach the number spots, a comparatively short round radial opening 0 is formed in the part A through the enlargement a, for each spot. The spot is in the form of a short cylindrical plug D having an annular groove d, between its ends,

and with a short tube or shell E of uniform diameter throughout its length, encircling it is placed in its opening 0 at the time the parts B B of the ball are to be attached to the part A. The heat to which the parts thus assembled are subjected renders the material comprising the part A around the tubeE, and said tube, plastic, and the pressure causes the portion 6 of the tubeadjacent to the annular groove d in the plug to enter therein and also the indentation of said portion by the adjacent portion of the part A thus securely fastening the plug in place.

What I claim is- .1. A ball comprising a main spherical part having a circumferential enlargement and parts covering the same on both sides of the enlargement.

2. A ball havinga circumferential enlargement and a number spot formed by an insex-ted plug having a cavity in its side and a tube encircling said plug and having its por- 

